I-40 EB over Gnbc R.R. & Neptune Dr.
Custer County, Oklahoma · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I-40 EB over Gnbc R.R. & Neptune Dr. in Custer County, Oklahoma, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1969, making it 56 years old at the 2025 inventory.
- It carries about 9,450 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 95 of the 387 inventoried bridges in Custer County rated fair (24.5%); 4 (1.0%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated March 2023, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (35.49883, -98.97719)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 325 ft |
| Location | South Edge Clinton |
| NBI structure number | 175810000000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oklahoma department of transportation.
Busiest bridges in Custer County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-40 over Little Deep Creek | 1959 | 23,800 | Good |
| I-40 over Creek | 1959 | 23,000 | Good |
| I-40 over Bear Creek | 1960 | 23,000 | Fair |
| I-40 over Creek | 1969 | 19,900 | Fair |
| I-40 over Creek | 1958 | 19,300 | Good |
| I-40 over Hackberry Creek | 1958 | 19,100 | Fair |
All bridges nearby: Custer County, OK bridge conditions · every bridge in Custer County · Oklahoma bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.